Web-based Grid Portal Software And Realization

Grid Portal is a web based application that providing content aggregation from different grid resources and grid services. Grid portal offers a better user interface, consistent accessing pattern and easy usage of the grid services, and solves the complexity in using grid computing resources. Essential and source-related performance data for middleware's of grid is provided by grid monitor, it lays the base for grid system to regulate performance and find errors. Grid monitor is an important foundation for the complete of grid job and job monitoring is an indivisibility part of grid monitoring. Task scheduling is an important component of grid to utilize grid resources fully and complete computing tasks rapidly.The use mode of grid is defined in the dissertation, a grid portal-WebGrid, is designed and implemented. The research and implemented of WebGrid are based on grid monitoring and task assignment, by research existing grid monitoring and task assignment mechanism, job running monitoring mechanism is adopted in WebGrid, by combine existing distribute technique, a self-determination grid monitoring system is developed, and a task assignment strategy based on GA (genetic algorithm) is addressed. The chromosome-coding method and the operator of genetic algorithm are discussed in detail. The relationship between sub-tasks can be obtained through the DAG, and then the subtasks are ranked according to their depth-value, which can avoid the emergence of invalidate chromosomes. In the single resource, Globus's principles are adopted to determine the sequence of the subtasks. MyProxy mechanism is introduced in security manage module of WebGrid, the disagreement of Web security protocols and Globus's grid security infrastructure is resolved. WebGrid adopt browse mode based on Web, integrated the function of Web and parallel computing.